These "oks" and offers were through email, so nothing is official just yet. 

Post on in all available channels. 

Thanks again, I am so excited to finally officially be apart of this community!

If you set your foundation TO BE a website, and you are planning to use your website as the main means to be found, then sure a website is the way to go first.BUT, if you manage to get a fantastic credibility score with your facebook page, twitter page, youtube channel, where you broadcast all your purchases, have a series of house flipping adventures all recorded, and the entire state raves about your facebook page with a ton of shares comments and reviews... do you think a desperate seller is going to pass you by because "I see no cheap wix site"?

I didn't go the "official" turnkey route, meaning I didn't buy the property from a turnkey company.

A bit tougher, but still very doable on MLS / FSBO channels. 

You were officially "out" of the lease at that point. 

They will likely want an official appraisal as part of their due diligence, so make sure your numbers are conservative.

Until you officially take ownership you have no authority to offer any changes.You need to spend time studying your state landlord tenant regulations.

I believe that Florida code requires that they be anchored perpendicular through the window frame channels and into the casements if the existing frames weren't impact rated, but check with the Hillsborough County building dept. to be sure.